36d16d34d7d1a4999be89b3b8ce3eb7091a304db44587082b5011f8bb1063ca8

Analysis

max time kernel
129s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 15:22

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General

Target

2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
Size

71KB
MD5

1635a743a05033b3cfaba4ab2461f7ad
SHA1

26ddbb4aacbcd4bfc2257f76ca675dbb95216470
SHA256

36d16d34d7d1a4999be89b3b8ce3eb7091a304db44587082b5011f8bb1063ca8
SHA512

387da8d0b238028d47e48cb6e9428e44d544bf5d3ff3adb545fb91667a85928678a67776bbe4026b349e665ae2a7f39d826eb0e413acf6a2fca4d579234f6e33
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTR:ZRpAyazIliazTR

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

208 CTS.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
208	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1312 2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
Token: SeDebugPrivilege 208 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1312	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
Token: SeDebugPrivilege	208	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe

description	pid	process	target process
PID 1312 wrote to memory of 208	1312	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe	CTS.exe
PID 1312 wrote to memory of 208	1312	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe	CTS.exe
PID 1312 wrote to memory of 208	1312	2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_1635a743a05033b3cfaba4ab2461f7ad_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1312

C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
8682dc03ee1950dc19cf4f78b32e0e88

SHA1
c2bae85e87449f750f8f00da7ca56fbba94030fe

SHA256
825eb2dd4b8582f0e6b07785aefa0c3d423504d5997fcc6272ac0436cfd2c57d

SHA512
3a521196fbea8699306b1989cea41a244d858fbe3111eac87ab48086c44e09999901eed556f6f4c7a9a0690e9a6e89f16c265ffc74477a53563581d9bddd2e7e

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C:\Users\Admin\AppData\Local\Temp\BLBBA94zDERnSa3.exe
Filesize
71KB

MD5
7a14ecfb519fbee283ba961942e45cc2

SHA1
bb9ea156eb3a48faf62c81fac85baa9f4fd863bf

SHA256
a6aad0caf680577ae4069d323aa2983e11371d5be793474f7fad43578c87f7e4

SHA512
6b962ec22dad2118f3ee693da6a79bff3d0df605ea07133663c3de7a09cf5ab5f208e27dfba41d22c40651ab41e7aa5708f628908c4f774af5f7ef0b0b6a9a05

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit